之后，将两根拇指放进凹陷两边，轻轻地剥开蛋壳。
Then put your two thumbs on opposite sides of the dent, and gently pull apart the shells.
在回答一个关于命运的问题时，菲利普-马萨（Felipe Massa）温柔地笑了，左眼上方的伤口缝合处明显地凹陷下去。
Felipe Massa traces the skin around the stitched but still dented wound over his left eye as he smiles gently at a question about the nature of fate.
刚孵化的布谷鸟还看不见东西，也没有羽毛，它们的背上有一个特殊的凹陷，就像一个酒窝，通过这个凹陷，它们就可以一个一个地把自己的同伴幼鸟背负出鸟巢。
The just-hatched cuckoo, still blind and featherless, has a special hollow like a dimple on its back, so that it can hump out of the nest, one by one, its companion fledglings.
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